Unblock a file with PowerShell?

Question

I am trying to have PowerShell unblock a file in Win2K8 R2.

Does anyone have a pointer as to the syntax?

Answer 1

I haven't seen any answer yet that seems to use the proper powershell cmdlets to do this.

Here we can find DLLs in the current folder that contain the zone.identifier:

Get-Item -Path .\*.dll -stream * | where {$_.Stream -eq "Zone.Identifier" }

Here we zap just only the unwanted streams, unlike some answers above that might damage other streams:

Remove-Item  -Path .\*.dll -stream Zone.Identifier